code: def __init__(self, value):
      self.value = value
  
file_path: ray/rllib/utils/debug/summary.py
imports: import numpy
  import pprint
  from typing import Any, Mapping
  from ray.rllib.policy.sample_batch import SampleBatch, MultiAgentBatch
  from ray.rllib.utils.annotations import DeveloperAPI
label_desc: Use image node_id 1 to create a new _StringValue object  with example: obj = _StringValue(value)